*{
    margin: 0;
    padding: 0;
}
body{
    background-color: #000;
    color: #666;
    text-align: center;
    font-size: 16px;
}
li{
    list-style: none;
}
audio{
    width: 450px;
    margin: 30px auto;
}
.container{
    height: 420px;
    overflow: hidden;
    /* border: 2px solid #fff; */
}
.container ul{
    /* border: 2px solid #fff; */
    transition: 0.6s;
}
.container ul li{
    height: 30px;
    line-height: 30px;
    transition: 0.6s;
}
.container ul li.active{
    color: #fff;
    transform: scale(1.2);
    transition: 0.6s;
}